AviaTech Channel - The picture represents 6 Basic Flight Instruments with their function. Analog instruments have been replaced by digital technology in newer aircraft however, aviation organizations suggest student pilot to start
Flight Instruments: The Altimeter and Altitudes – Learn to Fly Blog - ASA ( Aviation Supplies & Academics, Inc.)
Garmin Introduces New Primary Flight Instrument Replacement - AVweb
Instrumentation.html
How it works: The altimeter - AOPA
Ep. 3: Basic Flight Instruments | What they are - YouTube